259640641 has 8 divisors (see below), whose sum is σ = 280193984. Its totient is φ = 239170320.

The previous prime is 259640621. The next prime is 259640663. The reversal of 259640641 is 146046952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 259640641 - 2²³ = 251252033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 259640641.

It is not an unprimeable number, because it can be changed into a prime (259640621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14175 + ... + 26836.

It is an arithmetic number, because the mean of its divisors is an integer number (35024248).

Almost surely, 2^259640641 is an apocalyptic number.

It is an amenable number.

259640641 is a deficient number, since it is larger than the sum of its proper divisors (20553343).

259640641 is a wasteful number, since it uses less digits than its factorization.

259640641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41511.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 259640641 is about 16113.3683939765. The cubic root of 259640641 is about 637.9562416964.

It can be divided in two parts, 259640 and 641, that added together give a triangular number (260281 = T₇₂₁).

The spelling of 259640641 in words is "two hundred fifty-nine million, six hundred forty thousand, six hundred forty-one".